Built in active noise reduction function, users can hear the ambient sound. Harmful pulse noise can be immediately reduced. Voice menu and adjustment button are provided to control the sound level of active noise reduction restoration, balancer, adjustable restoration time, equalizer, adjustable external input volume and external input mode. The battery life is about 1000 hours. The earmuff will send out a low battery warning signal before the low battery automatic shutdown.

The utility model relates to an ear protector which can cover the whole ear. The noise proof earmuff is composed of two round shells connected by the bow frame. The shell is attached with sound absorbing materials and sealing washers, which are shaped like earphones as a whole. It is suitable for high noise environment, and the sound attenuation can reach 10-30dB. It can be used alone or in combination with earplugs. Suitable for people with various ear types. Easy to take off; But it feels stuffy and hot after a long time of use.